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                    Latest version PsychoPy 2021.2 with mic recordings (local and online) and Builder eyetracking components! DOWNLOAD now
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            <p>PsychoPy is a free cross-platform package allowing you to run a wide range of experiments in the behavioral sciences (neuroscience, psychology, psychophysics, linguistics...) </p>
            <p>This is a community project. Users have all the source code. Users are the developers. Users support each other. 
            <p>Alongside open-source, we're strong supporters of Open Science, and we'll try to encourage and facilitate that wherever we can!
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        <h2>Easy enough for teaching</h2>
        <p>Universities all over the world are using PsychoPy for teaching students about experiments</p>
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                    <li>Flexible and intuitive <a href="builder.html">Builder interface</a> to create huge range of studies
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                    <li><a href="https://uk.sagepub.com/en-gb/eur/building-experiments-in-psychopy/book253480"> Textbook</a>(s) suitable for both undergraduate and professional audiences
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                    <li>Many further <a href="resources/resources.html">resources</a> for learning and teaching, including <a href="https://www.youtube.com/playlist?list=PLFB5A1BE51964D587">Youtube tutorials</a>, online tutorials and workshops.
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                    <li><a href="https://pavlovia.org">The Pavlovia repository of shared experiments</a> accessible directly from the application (requires PsychoPy3) to search for and share your studies.
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<section class="bg-light" id="precise">
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        <h2>Precise enough for psychophysics</h2>
        <p>Hardware accelerated graphics, best-in class timing, and calibration tools built in</p>
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                <ul>
                    <li>Fantastic timing precision (see the <a href="https://peerj.com/articles/9414/">timing mega-study</a> for comparisons)!
                    </li>
                    <li>Time and update your stimulus on every screen refresh!
                    </li>
                    <li>Tools to help monitor calibration and wide range of units 
                    </li>
                    <li>Hardware-accelerated graphics for stimuli that can be updated on the fly
                    </li>
                    <li>Access to button boxes when you need the utmost precision
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                    <li>Automated logging for you to what happened and when
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                    <li>OpenGL (and shaders) ready for use when you low-level access to graphics
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        <h2>Flexible enough for everything else</h2>   
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                PsychoPy is great for:
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                    <li><strong>Dynamic, interactive studies:</strong> Free yourself from simple static stimuli! You can update your stimulus interactively on every screen refresh!
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                    <li><strong>Neuroimaging:</strong> Send and receive triggers to your hardware at precise times
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                    <li><strong>Eye-tracking:</strong> Access to wide range of hardware (eye trackers, button boxes, trigger systems...)
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<section class="bg-light" id="online">
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        <h2>Online</h2>
        <p>Want to run your study on the web, so users can access it anywhere?</p>
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            <p>PsychoPy3 added the facility to run studies online using a high-performance, hardware-accelerated, port of the PsychoPy Python library.</p>
            <ul>
                <li>Export your experiment from Builder to a web page
                </li>
                <li>PsychoPy is the <a href="https://peerj.com/articles/9414/">only package with reaction time precision under 4 ms online</a>!
                </li>
                <li>Update your stimulus on every frame, just like in the desktop!
                </li>
                <li>Upload that to <a href="https://pavlovia.org">Pavlovia.org</a> (with easy tools built into the PsychoPy app)
                </li>
                <li>Give participants your URL and run your study in the browser!
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                <li>You can recruit participants using Sona, Prolific, Mechanical Turk or similar systems.
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        <h2>Open science</h2>
        <p>Did you notice that everyone's sharing these days?</p>
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                <a style="background-color:black;color:white;text-decoration:none;padding:4px 6px;font-family:-apple-system, BlinkMacSystemFont, &quot;San Francisco&quot;, &quot;Helvetica Neue&quot;, Helvetica, Ubuntu, Roboto, Noto, &quot;Segoe UI&quot;, Arial, sans-serif;font-size:12px;font-weight:bold;line-height:1.2;display:inline-block;border-radius:3px" href="https://unsplash.com/@ricsard?utm_medium=referral&amp;utm_campaign=photographer-credit&amp;utm_content=creditBadge" target="_blank" rel="noopener noreferrer" title="Download free do whatever you want high-resolution photos from Richard Balog"><span style="display:inline-block;padding:2px 3px"><svg xmlns="http://www.w3.org/2000/svg" style="height:12px;width:auto;position:relative;vertical-align:middle;top:-2px;fill:white" viewBox="0 0 32 32"><title>unsplash-logo</title><path d="M10 9V0h12v9H10zm12 5h10v18H0V14h10v9h12v-9z"></path></svg></span><span style="display:inline-block;padding:2px 3px">Richard Balog</span></a>
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                <ul>
                    <li>PsychoPy was written by scientists for scientists
                    </li>
                    <li>You have all the source code. If you want something added or changed you can go ahead and make that change!
                    </li>
                    <li><a href="https://github.com/psychopy/psychopy/graphs/contributors">Over 100 contributors</a> have made changes (small or large) and fed them back to the project for others to benefit!
                    </li>
                    <li>You can <a href="https://pavlovia.org">share your study</a> on <a href="https://pavlovia.org">Pavlovia.org</a> and that means more people might be tempted to base their work on yours (which means more people talking about your work).
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